BALTIMORE (WJZ) — A new mask mandate goes into effect in just a few hours.

The CDC says that all passengers traveling in the country must wear a mask. That includes on planes, trains or any other forms of public transportation.

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The mandate will pertain to BWI Airport as well.

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The agency said the mandate is a bid to help slow the spread of the coronavirus. The rule goes into effect at 11:59 p.m.

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For the latest information on coronavirus go to the Maryland Health Department’s website or call 211. You can find all of WJZ’s coverage on coronavirus in Maryland here.